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A073501 Primes p such that the largest prime factor of p^2+1 is less than p. 7
7, 41, 43, 47, 73, 83, 157, 173, 191, 193, 211, 233, 239, 251, 293, 307, 313, 337, 401, 421, 431, 443, 463, 467, 499, 509, 557, 577, 593, 599, 601, 659, 701, 743, 757, 787, 811, 829, 853, 857, 863, 911, 919, 1087, 1109, 1123, 1223, 1229, 1277, 1297, 1301 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes p such that the largest prime factor of p+1 is less than p gives A065091, odd primes.

LINKS

Table of n, a(n) for n=1..51.

MATHEMATICA

<<NumberTheory`NumberTheoryFunctions` Select[Prime[Range[250]], Max[PrimeFactorList[1 + #^2]] < # &] (Ray Chandler, Jan 08 2005)

CROSSREFS

Cf. A065091, A073501.

Sequence in context: A123747 A144421 A023251 * A080666 A224718 A105902

Adjacent sequences:  A073498 A073499 A073500 * A073502 A073503 A073504

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Aug 27 2002

STATUS

approved

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Last modified May 24 02:16 EDT 2013. Contains 225613 sequences.