A115377 - OEIS

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A115377

Numbers n such that the first n digits of Sqrt[2] form a prime.

55, 97, 225, 11260, 11540 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	LINKS	`Eric Weisstein's World of Mathematics, Pythagoras Prime` `Eric Weisstein's World of Mathematics, Integer Sequence Primes`
	EXAMPLE	`First Pythagorean prime is 1414213562373095048801688724209698078569671875376948073, which has 55 digits`
	CROSSREFS	`Cf. A002193.` `Sequence in context: A128880 A039596 A013543 * A146145 A044144 A044525` `Adjacent sequences: A115374 A115375 A115376 * A115378 A115379 A115380`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com), Jan 21, 2006`

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Last modified February 14 04:48 EST 2012. Contains 205570 sequences.