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A086983 Primes of the form 2^r*p^s - 1, where p is an odd prime. +0
1
2, 3, 5, 7, 11, 13, 17, 19, 23, 31, 37, 43, 47, 53, 61, 67, 71, 73, 79, 97, 103, 107, 127, 151, 157, 163, 191, 193, 199, 211, 223, 241, 271, 277, 283, 313, 331, 337, 367, 383, 397, 421, 431, 457, 463, 487, 499, 523, 541, 547, 577, 607, 613, 631, 647, 661, 673 (list; graph; listen)
OFFSET

1,1

COMMENT

Primes p such that p+1 has at most one odd prime divisor.

CROSSREFS

Cf. A005105, A077497, A077498, A077499, A077500.

Cf. also A005109, A077313, A077314, A077315.

Sequence in context: A042966 A128898 A006514 this_sequence A046501 A033875 A105581

Adjacent sequences: A086980 A086981 A086982 this_sequence A086984 A086985 A086986

KEYWORD

nonn

AUTHOR

Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 02 2003

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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