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A062642 Numbers k such that 76^k - 75^k is prime. 0
2, 5, 61, 97, 167, 433 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms > 1000 are often only strong pseudoprimes.

a(7) > 10^5. - Robert Price, Jul 24 2014

LINKS

Table of n, a(n) for n=1..6.

MATHEMATICA

Select[Range[450], PrimeQ[76^#-75^#]&] (* Harvey P. Dale, Aug 30 2013 *)

PROG

(PARI) is(n)=ispseudoprime(76^n-75^n) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A000043, A057468, A059801, A059802, A062572-A062666.

Sequence in context: A138788 A030244 A004150 * A294528 A093484 A250195

Adjacent sequences:  A062639 A062640 A062641 * A062643 A062644 A062645

KEYWORD

nonn,hard

AUTHOR

Mike Oakes, May 18 2001, May 19 2001

STATUS

approved

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Last modified October 20 03:04 EDT 2021. Contains 348099 sequences. (Running on oeis4.)