id:A083732 - OEIS Search Results

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Pseudoprimes to bases 2 and 5.

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561, 1729, 2821, 5461, 6601, 8911, 12801, 13981, 15841, 29341, 41041, 46657, 52633, 63973, 68101, 75361, 101101, 113201, 115921, 126217, 137149, 162401, 172081, 188461, 252601, 294409, 314821, 334153, 340561, 399001, 401401, 410041, 488881 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`F. Richman, Primality testing with Fermat's little theorem`
	FORMULA	`a(n) = n-th positive integer k(>1) such that 2^(k-1) = 1 (mod k) and 5^(k-1) = 1 (mod k)`
	EXAMPLE	`a(1)=561 since 561 is the first positive integer k(>1) which satisfies 2^(k-1) = 1 (mod k) and 5^(k-1) = 1 (mod k)`
	PROGRAM	`Assembly`
	CROSSREFS	`Sequence in context: A083733 A048123 A131672 this_sequence A135720 A097130 A110889` `Adjacent sequences: A083729 A083730 A083731 this_sequence A083733 A083734 A083735`
	KEYWORD	`easy,nonn`
	AUTHOR	`Serhat Sevki Dincer (sevki(AT)ug.bilkent.edu.tr), May 05 2003`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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