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A109749 Numbers n such that 88 * 10^n + 1 is prime. 0
1, 3, 4, 7, 18, 30, 82, 99, 105, 106, 147, 334, 1092, 1221, 3705, 5524, 30355 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

All terms have been certified. Primality proof for the largest: PFGW Version 20041001.Win_Stable (v1.2 RC1b) [FFT v23.8] Primality testing 88*10^30355+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 69.89% 88*10^30355+1 is prime! (491.3713s+0.8690s)

LINKS

Table of n, a(n) for n=1..17.

PROG

(PARI) is(n)=ispseudoprime(88*10^n+1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A056804, A056797.

Sequence in context: A153067 A041593 A258740 * A041497 A042227 A117789

Adjacent sequences:  A109746 A109747 A109748 * A109750 A109751 A109752

KEYWORD

more,nonn

AUTHOR

Jason Earls, Aug 11 2005

STATUS

approved

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Last modified March 26 20:42 EDT 2019. Contains 321534 sequences. (Running on oeis4.)