A065990 Numbers k such that the first k base-5 digits of Pi expressed in decimal forms a prime.

1, 6, 102, 131, 230

Offset: 1

Author

Robert G. Wilson v, Dec 10 2001

Keywords

• base
• nonn
• more

Examples

			The first 6 quinary digits of Pi (A004604) are 303232 = 9817 in decimal, which is a prime.
		

Crossrefs

Cf. A004604.

Programs

Mathematica

Do[ If[ PrimeQ[ FromDigits[ First[ RealDigits[Pi, 5, n]], 5]], Print[n]], {n, 1, 3600} ]