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A064908
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Semiprimes p1*p2 such that p2 mod p1 = 10, with p2 > p1.
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1
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299, 473, 551, 1037, 1199, 1271, 1273, 1313, 1441, 1651, 1739, 1817, 2167, 2279, 2327, 2651, 2771, 2813, 2893, 3193, 3341, 3349, 3377, 3439, 3679, 4103, 4331, 4829, 4883, 5071, 5707, 5977, 6049, 6059, 6239, 6281, 6383, 6523, 6817, 7031, 7037, 7097
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OFFSET
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1,1
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LINKS
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John Cerkan, Table of n, a(n) for n = 1..10000
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PROG
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(Python)
from sympy import factorint
def is_A064908(n):
f = factorint(n)
return (sum([f[i] for i in f]) == 2) and (max(f) % min(f) == 10) # John Cerkan, Apr 14 2018
(PARI) isok(n) = my(f = factor(n)); (#f~ == 2) && (vecmax(f[, 2]) < 2) && ((f[2, 1] % f[1, 1]) == 10); \\ Michel Marcus, Apr 16 2018
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CROSSREFS
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Cf. A001358 (p2 mod p1 = 0), A064899-A064911.
Sequence in context: A249296 A245956 A235229 * A341189 A105990 A160484
Adjacent sequences: A064905 A064906 A064907 * A064909 A064910 A064911
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KEYWORD
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nonn
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AUTHOR
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Patrick De Geest, Oct 13 2001
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EXTENSIONS
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Offset changed by John Cerkan, Apr 12 2018
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STATUS
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approved
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