A110776 Copies of 1 and 7 alternately such that every partial concatenation is a prime.

11, 777, 11, 777777, 111111111, 7777777777777777777777777, 111111111, 777

Offset: 1

Author

Amarnath Murthy, Aug 12 2005

Keywords

• base
• nonn

Examples

			11, 11777, 1177711, ... are all prime.
		

Crossrefs

Cf. A110774, A110775, A110777, A110778, A112534, A110780, A110781, A110782, A110783, A110788, A110789.

Extensions

Corrected and extended by Joshua Zucker, Jan 11 2006

The next term has 762 1's and is too large to include.