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 A045710 Primes with first digit 4. 22
 41, 43, 47, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 4001, 4003, 4007, 4013, 4019, 4021, 4027, 4049, 4051, 4057, 4073, 4079, 4091, 4093, 4099, 4111, 4127, 4129, 4133, 4139, 4153, 4157, 4159, 4177, 4201, 4211 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..5000 MATHEMATICA Select[Table[Prime[n], {n, 1000}], First[IntegerDigits[#]] == 4 &] Flatten[Table[Prime[Range[PrimePi[4 * 10^n] + 1, PrimePi[5 * 10^n]]], {n, 3}]] (* Alonso del Arte, Jul 19 2014 *) PROG (Magma) [p: p in PrimesUpTo(10^4) | Intseq(p)[#Intseq(p)] eq 4]; // Bruno Berselli, Jul 19 2014 CROSSREFS For primes with initial digit d (1 <= d <= 9) see A045707, A045708, A045709, A045710, A045711, A045712, A045713, A045714, A045715; A073517, A073516, A073515, A073514, A073513, A073512, A073511, A073510, A073509 Column k=4 of A262369. Sequence in context: A345346 A062669 A284290 * A090152 A139774 A007643 Adjacent sequences: A045707 A045708 A045709 * A045711 A045712 A045713 KEYWORD nonn,base,easy AUTHOR Felice Russo EXTENSIONS More terms from Erich Friedman. STATUS approved

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Last modified June 15 02:53 EDT 2024. Contains 373402 sequences. (Running on oeis4.)