A057563 Numbers k such that the k initial decimal digits of e - 2 form a prime number.

1, 2, 49, 114, 126, 295, 357, 1090, 6152

Offset: 1

Author

G. L. Honaker, Jr., Oct 04 2000

Keywords

• nonn
• base
• more

Comments

a(10) > 300000 "or so" (according to S. Batalov, Jul 06 2017). - Eric W. Weisstein, Jun 10 2017

Examples

			Since e - 2 = 0.71828182845904..., the first terms are:
k = 1 gives 7, which is prime.
k = 2 gives 71, which is prime.
k = 49 gives 7182818284590452353602874713526624977572470936999, which is prime.
		

Links

• Titanix [Broken link]

Extensions

a(8) proved prime by Andrey V. Kulsha using Titanix.

a(9) from Serge Batalov, Jun 21 2017