A064699 - OEIS

A064699

Integers for which the smallest m in A040076 such that n*2^m+1 is prime (A050921) increases.

1, 3, 7, 17, 19, 31, 47, 383, 2897, 3061, 4847, 5359, 10223

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OFFSET

1,2

COMMENTS

Where records occur in A040076. A103964 gives the record values.

LINKS

MATHEMATICA

a = -1; Do[m = 0; While[ !PrimeQ[n*2^m + 1], m++ ]; If[m > a, a = m; Print[n]], {n, 1, 10^3} ]

CROSSREFS

KEYWORD

more,nonn

AUTHOR

EXTENSIONS

Corrected and extended by T. D. Noe, Nov 15 2010

a(13) was found by PrimeGrid, added by Arkadiusz Wesolowski, Feb 13 2017

STATUS

approved