login
A110720
Beginning with 5, concatenation of n successive numbers such that every partial concatenation is a prime.
1
5, 23, 353637, 18192021, 7576777879, 67891011, 71727374757677, 12121213121412151216121712181219, 5678910111213, 1194119511961197119811991200120112021203
OFFSET
1,1
EXAMPLE
5,523,523353637,... are all prime.
KEYWORD
base,hard,nonn
AUTHOR
Amarnath Murthy, Aug 05 2005
EXTENSIONS
More terms from Jon E. Schoenfield, Jul 11 2010
STATUS
approved