This number is a composite. Show  Let a(n) = the number of primes that end in "01" among the first 10^n primes. The sequence begins 0, 2, 25, 254, 2494, 24959, 249814, 2499088, 24998779, ... Let a(n) = the number of primes that end in "03" among the first 10^n primes. The sequence begins 0, 2, 25, 249, 2510, 25056, 250276, 2500054, 24998487, ... Let a(n) = the number of primes that end in "07" among the first 10^n primes. The sequence begins 0, 2, 27, 249, 2459, 24931, 250103, 2500735, 25000294, ... Let a(n) = the number of primes that end in "09" among the first 10^n primes. The sequence begins 0, 3, 24, 245, 2504, 24961, 249670, 2500222, 25001398, ... Let a(n) = the number of primes that end in "11" among the first 10^n primes. The sequence begins 1, 3, 25, 257, 2492, 25048, 249864, 2499701, 25001011, Let a(n) = the number of primes that end in "13" among the first 10^n primes. The sequence begins 1, 3, 23, 256, 2489, 24956, 249883, 2499909, 25002129, ... Let a(n) = the number of primes that end in "17" among the first 10^n primes. The sequence begins 1, 2, 25, 253, 2519, 25001, 250172, 2500991, 24998892, ... Let a(n) = the number of primes that end in "19" among the first 10^n primes. The sequence begins 1, 2, 27, 248, 2514, 25003, 250137, 2499557, 24999197, ... Let a(n) = the number of primes that end in "21" among the first 10^n primes. The sequence begins 0, 2, 27, 250, 2486, 24973, 249850, 2499065, 24999554, ... Let a(n) = the number of primes that end in "23" among the first 10^n primes. The sequence begins 1, 3, 28, 259, 2511, 25012, 249966, 2499856, 24999237, ... Let a(n) = the number of primes that end in "27" among the first 10^n primes. The sequence begins 0, 2, 23, 250, 2504, 24931, 250074, 2499704, 24999642, ... Let a(n) = the number of primes that end in "29" among the first 10^n primes. The sequence begins 1, 2, 26, 255, 2491, 24966, 249873, 2499819, 24999296, ... Let a(n) = the number of primes that end in "31" among the first 10^n primes. The sequence begins 0, 4, 24, 251, 2502, 24973, 249851, 2499874, 25001020, ... Let a(n) = the number of primes that end in "33" among the first 10^n primes. The sequence begins 0, 2, 24, 247, 2509, 24981, 250124, 2499684, 24999545, ... Let a(n) = the number of primes that end in "37" among the first 10^n primes. The sequence begins 0, 3, 25, 254, 2522, 24959, 249813, 2499850, 25001924, ... Let a(n) = the number of primes that end in "39" among the first 10^n primes. The sequence begins 0, 3, 23, 254, 2512, 25041, 249731, 2499788, 25001154, ... Let a(n) = the number of primes that end in "41" among the first 10^n primes. The sequence begins 0, 3, 21, 237, 2505, 24960, 249754, 2500494, 249998836, ... Let a(n) = the number of primes that end in "43" among the first 10^n primes. The sequence begins 0, 2, 24, 246, 2484, 25006, 249884, 2500043, 25002072, ... Let a(n) = the number of primes that end in "47" among the first 10^n primes. The sequence begins 0, 2, 26, 248, 2520, 24992, 249765, 2499987, 25002877, ... Let a(n) = the number of primes that end in "49" among the first 10^n primes. The sequence begins 0, 3, 23, 245, 2516, 24980, 249954, 2499220, 25000053, ... Let a(n) = the number of primes that end in "51" among the first 10^n primes. The sequence begins 0, 2, 28, 253, 2504, 25015, 250178, 2500410, 25001559, ... Let a(n) = the number of primes that end in "53" among the first 10^n primes. The sequence begins 0, 2, 27, 250, 2497, 24974, 250005, 2499972, 24999702, ... Let a(n) = the number of primes that end in "57" among the first 10^n primes. The sequence begins 0, 3, 29, 246, 2528, 25040, 250114, 2499937, 24999120, ... Let a(n) = the number of primes that end in "59" among the first 10^n primes. The sequence begins 0, 2, 26, 254, 2512, 25007, 250264, 2500225, 24999949, ... Let a(n) = the number of primes that end in "61" among the first 10^n primes. The sequence begins 0, 2, 23, 239, 2491, 24951, 250117, 2500005, 24998609, ... Let a(n) = the number of primes that end in "63" among the first 10^n primes. The sequence begins 0, 3, 23, 246, 2516, 25021, 250080, 2500156, 25000087, ... Let a(n) = the number of primes that end in "67" among the first 10^n primes. The sequence begins 0, 4, 25, 250, 2479, 25038, 250019, 2499172, 24999835, ... Let a(n) = the number of primes that end in "69" among the first 10^n primes. The sequence begins 0, 1, 22, 247, 2479, 25021, 249895, 2500196, 24999156, ... Let a(n) = the number of primes that end in "71" among the first 10^n primes. The sequence begins 0, 2, 23, 245, 2500, 24995, 250012, 2500832, 24999429, ... Let a(n) = the number of primes that end in "73" among the first 10^n primes. The sequence begins 0, 3, 27, 244, 2474, 25040, 249980, 2500778, 25001960, ... Let a(n) = the number of primes that end in "77" among the first 10^n primes. The sequence begins 0, 1, 25, 242, 2488, 25099, 250165, 2499766, 25000007, ... Let a(n) = the number of primes that end in "79" among the first 10^n primes. The sequence begins 0, 4, 26, 253, 2503, 25059, 250054, 2500497, 24999733, ... Let a(n) = the number of primes that end in "81" among the first 10^n primes. The sequence begins 0, 2, 24, 251, 2487, 25001, 249942, 2500072, 25000149, ... Let a(n) = the number of primes that end in "83" among the first 10^n primes. The sequence begins 0, 3, 27, 256, 2510, 24978, 249909, 2499642, 25000408, ... Let a(n) = the number of primes that end in "87" among the first 10^n primes. The sequence begins 0, 1, 23, 255, 2516, 25046, 249966, 2500611, 24999550, ... Let a(n) = the number of primes that end in "89" among the first 10^n primes. The sequence begins 0, 2, 25, 247, 2484, 24914, 250134, 2499991, 24998766, ... Let a(n) = the number of primes that end in "91" among the first 10^n primes. The sequence begins 0, 2, 25, 247, 2506, 25059, 250373, 2499894, 24998633, ... Let a(n) = the number of primes that end in "93" among the first 10^n primes. The sequence begins 0, 2, 24, 261, 2506, 25085, 250101, 2500040, 24998592, ... Let a(n) = the number of primes that end in "97" among the first 10^n primes. The sequence begins 0, 3, 25, 260, 2479, 24976, 250091, 2499648, 25000363, ... Let a(n) = the number of primes that end in "99" among the first 10^n primes. The sequence begins 0, 2, 24, 243, 2494, 24988, 250039, 2500511, 24998992, ...... for example "Car Number 57" is leading after the first 10^3 laps (primes). But what about after 10^4 laps? 10^5 laps, etc.? Place your bets now! Update: Thanks to Chuck Gaydos of Arizona, we now know that "Car Number 47" is in the lead with 25002877 primes after 10^9 (one billion) laps. Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell What are the prime numbers from 1 to 40?The prime numbers from 1 to 100 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.
How many prime numbers are there in 40?So, the prime factorisation of 40 are 2 × 2 × 2 × 5 or 23 × 5, where 2 and 5 are the prime numbers.
What is the nearest prime number of 40?The prime factors of 40 are 2, 5.
How many prime numbers are there below 40?There are 12 prime numbers lower than 40.
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