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A069592 Smallest prime in which the n-th significant digit is a 5. 6
5, 53, 503, 5003, 50021, 500009, 5000011, 50000017, 500000003, 5000000029, 50000000021, 500000000023, 5000000000053, 50000000000053, 500000000000057, 5000000000000023, 50000000000000051, 500000000000000021 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Abhiram R Devesh, Table of n, a(n) for n = 1..100

MAPLE

5, seq(nextprime(5*10^j), j=1..32);

MATHEMATICA

a069592[n_Integer] := Module[{f}, f[1] = 5; f[i_] := NextPrime[5*10^(i - 1)]; f[n]]; Map[a069592, Range[100]] (* Michael De Vlieger, Aug 06 2014 *)

Join[{5}, NextPrime[5*10^Range[20]]] (* Harvey P. Dale, May 15 2016 *)

PROG

(Python)

import sympy

i=0

print(5)

i=i+1

while i > -1:

....a=5*(10**i)

....p=sympy.nextprime(a)

....print(p)

....i=i+1

## Abhiram R Devesh, Jul 31 2014

(PARI) a(n) = nextprime(5*10^n); \\ Michel Marcus, Aug 07 2014

CROSSREFS

Cf. A069588, A069589, A069590, A069591.

Sequence in context: A221236 A198963 A293082 * A065534 A186206 A123788

Adjacent sequences:  A069589 A069590 A069591 * A069593 A069594 A069595

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Mar 25 2002

EXTENSIONS

More terms from Sascha Kurz, Mar 28 2002

STATUS

approved

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Last modified April 6 08:44 EDT 2020. Contains 333268 sequences. (Running on oeis4.)