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A015940 Positive integers n such that 2^n == -3 (mod n). 5
1, 5, 917, 3223, 62911, 326329, 395819, 33504053, 4446226763, 17556128765, 141613728437, 5259417592253, 113837290408523 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

No other terms below 10^16.

Larger term: 18468744643735483963902321985787. - Max Alekseyev, Aug 01 2011

LINKS

Table of n, a(n) for n=1..13.

OEIS Wiki, 2^n mod n

MATHEMATICA

Do[ If[ PowerMod[ 2, n, n ] + 3 == n, Print[n]], { n, 1, 10^9, 2 } ]

CROSSREFS

Cf. A050259.

Sequence in context: A094630 A284637 A173914 * A093853 A195627 A318066

Adjacent sequences:  A015937 A015938 A015939 * A015941 A015942 A015943

KEYWORD

nonn,more

AUTHOR

Robert G. Wilson v

EXTENSIONS

Corrected and extended by Olivier Wittenberg, May 23 2004.

a(10)-a(13) from Max Alekseyev, Aug 01 2011

STATUS

approved

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Last modified October 13 19:35 EDT 2019. Contains 327981 sequences. (Running on oeis4.)