A004203 - OEIS

A004203

Numbers n such that 54*10^n + 1 is prime.

1, 3, 5, 11, 47, 79, 275, 839, 1877, 3399, 5371, 6671, 30659, 43575

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

No more terms through 10^5.

LINKS

PROG

(PARI) is(n)=ispseudoprime(54*10^n+1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

KEYWORD

nonn

AUTHOR

EXTENSIONS

a(1)-a(9) computed by Cletus Emmanuel (cemmanu(AT)uvi.edu) and Richard Pinch

a(10)-a(14) from Cletus Emmanuel (cemmanu(AT)yahoo.com), submitted by Ray Chandler, Feb 15 2005

STATUS

approved