A103144 - OEIS

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A103144

Decimal primes whose decimal representation in hex is also prime.

2, 3, 5, 7, 11, 13, 17, 29, 43, 47, 53, 59, 61, 67, 71, 83, 89, 97, 101, 107, 137, 139, 151, 167, 191, 199, 223, 233, 239, 241, 251, 257, 269, 277, 281, 283, 293, 313, 337, 347, 359, 373, 397, 409, 419, 443, 449, 463, 503, 509, 557, 577, 593, 599, 607, 617, 641 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`Top 1067 elements listed.`
	FORMULA	`a = primes(300000); j = 0; for i = 1:19000 b = dec2hex(a(i)); c = num2str(b); d = str2num(c); if d < 2^32 if isprime(d) j = j + 1; e(j) = d; end; end; end;`
	EXAMPLE	`11 is prime` `Hex(11) = 17 is prime`
	PROG	`MatLab`
	CROSSREFS	`Cf. A089971.` `Sequence in context: A152245 A007693 A174048 * A105909 A197187 A086498` `Adjacent sequences: A103141 A103142 A103143 * A103145 A103146 A103147`
	KEYWORD	`easy,nonn`
	AUTHOR	`Lei Zhou (lzhou5(AT)emory.edu), Jan 26 2005`

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Last modified February 17 23:58 EST 2012. Contains 206085 sequences.