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A090084 Even pseudoprimes to base 11. 14
10, 70, 190, 1330, 8170, 9730, 24130, 28462, 58030, 98458, 143830, 144886, 327370, 856786, 1580230, 1620130, 3536470, 5274970, 6082490, 6376126, 6792710, 8066170, 8610610, 14076910, 17728930, 27275158, 42447406, 52970386, 53497978, 68925130 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert G. Wilson v, Table of n, a(n) for n = 1..84.

Eric Weisstein's World of Mathematics, Fermat Pseudoprime.

Index entries for sequences related to pseudoprimes

MATHEMATICA

Do[ f=PowerMod[ 11, 2n-1, 2n ]; If[ f==1, Print[ 2n ] ], {n, 2, 800000} ] (* Alexander Adamchuk, May 26 2007 *)

lst = {}; Do[ If[ PowerMod[11, 2n - 1, 2n] == 1, AppendTo[lst, 2n]], {n, 2, 2*10^9}]; lst (* Robert G. Wilson v, Jun 01 2007 *)

Select[Range[4, 68926000, 2], PowerMod[11, #-1, #]==1&] (* Harvey P. Dale, Oct 16 2021 *)

CROSSREFS

Cf. A020139.

Cf. A020139, A006935, A130433, A090082, A090083, A090084, A090085, A130434, A130435, A130436, A130438, A130439, A130440, A130441, A130442, A130443.

Sequence in context: A320228 A130548 A160662 * A025221 A271040 A005567

Adjacent sequences:  A090081 A090082 A090083 * A090085 A090086 A090087

KEYWORD

nonn

AUTHOR

Labos Elemer, Nov 25 2003

EXTENSIONS

More terms from Alexander Adamchuk, May 26 2007

Further terms from Robert G. Wilson v, Jun 01 2007

STATUS

approved

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Last modified August 14 12:15 EDT 2022. Contains 356116 sequences. (Running on oeis4.)