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 A091490 Primes p such that all prime divisors of p^2 + p + 1 are less than p. 1
 67, 79, 137, 149, 163, 181, 191, 211, 229, 263, 269, 277, 313, 373, 431, 439, 499, 521, 571, 631, 653, 787, 809, 811, 821, 823, 919, 947, 971, 991, 997, 1049, 1069, 1087, 1109, 1129, 1153, 1231, 1237, 1283, 1291, 1367, 1429, 1451, 1459, 1471, 1493, 1511 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. J. Mathar, Table of n, a(n) for n = 1..4725 Robin Chapman, Comments on the Somon Davis paper Simon Davis, A Proof of the Odd Perfect Number Conjecture, arXiv:hep-th/0401052 [But see the comments on this paper by Robin Chapman] MATHEMATICA PrimeFactors[ n_Integer ] := Flatten[ Table[ #[ [ 1 ] ], {1} ] & /@ FactorInteger[ n ] ]; Prime[ Select[ Range[ 242 ], Prime[ # ] > PrimeFactors[ Prime[ # ]^2 + Prime[ # ] + 1 ][ [ -1 ] ] & ] ] CROSSREFS Cf. A073501. Sequence in context: A106930 A106929 A173040 * A091075 A288409 A139973 Adjacent sequences:  A091487 A091488 A091489 * A091491 A091492 A091493 KEYWORD nonn AUTHOR R. K. Guy and Robert G. Wilson v, Jan 14 2004 STATUS approved

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Last modified July 20 12:11 EDT 2017. Contains 289626 sequences.