A068162 Smallest prime beginning and ending in at least n 7's.

7, 77377, 7772777, 777767777, 77777677777, 7777774777777, 777777727777777, 77777777677777777, 77777777704777777777, 777777777727777777777, 77777777777677777777777, 7777777777772777777777777, 777777777777757777777777777

Offset: 1

Author

Amarnath Murthy, Feb 24 2002

Keywords

• base
• nonn

Examples

			a(2) = 77377 is a prime that starts with 77 and ends in 77 (two 7's).
		

Crossrefs

Cf. A068160, A068161.

Extensions

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 07 2003

a(1)=7 from Sean A. Irvine, Jan 30 2024