A069590 Smallest n-digit prime starting with a 2.

2, 23, 211, 2003, 20011, 200003, 2000003, 20000003, 200000033, 2000000011, 20000000089, 200000000041, 2000000000003, 20000000000021, 200000000000027, 2000000000000021, 20000000000000003, 200000000000000003, 2000000000000000057, 20000000000000000011

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..996

Maple

seq(nextprime(2*10^(n-1)-1), n=1..22);

Mathematica

Join[{2}, NextPrime[2*10^Range[20]]] (* Paolo Xausa, Jun 22 2024 *)

Crossrefs

Cf. A069588, A069589.

Sequence in context: A118756 A133955 A062600 * A024028 A288820 A340296

Adjacent sequences: A069587 A069588 A069589 * A069591 A069592 A069593

Keyword

base,nonn

Author

Amarnath Murthy, Mar 25 2002

Extensions

More terms from Sascha Kurz, Mar 28 2002

Simpler definition from Robert Israel, Jun 21 2024

Status

approved