A065990 The first n base-5 digits of Pi expressed in decimal forms a prime.

1, 6, 102, 131, 230

Offset

1,2

Links

Table of n, a(n) for n=1..5.

Example

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

Mathematica

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

Crossrefs

Cf. A004604.

Sequence in context: A266683 A196960 A218462 * A306406 A344400 A277662

Adjacent sequences: A065987 A065988 A065989 * A065991 A065992 A065993

Keyword

base,nonn

Author

Robert G. Wilson v, Dec 10 2001

Status

approved