 |
77777...31313 (27-digits) (just those submitted by De Geest) |
|
|
|
Curios:
Curios Search:
Participate: 
|
Just showing those entries submitted by 'De Geest': (Click here to show all) 
Thirteen 7's followed by seven 13's is prime. "Lucky 7" and "Unlucky 13" keeping each other in perfect balance. [De Geest]
Prime Curios! © 1999-2013 (all rights
reserved)
|