11111...99999 (388-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

                                   11111111 1111111111 1111111111 1111111111
1111111112 2222222222 2222222222 2222222222 2222222222 2222233333 3333333333
3333333333 3333333333 3333333334 4444444444 4444444444 4444444444 4444444444
4444445555 5555555555 5555555555 5555555555 5555555555 6666666666 6666666666
6666666666 6666666666 6666777777 7777777777 7777777777 7788888888 8888888888
8888888888 8888888888 8888888999 9999999999 9999999999 9999999999 9999999999

The largest prime found in the first 430 digits of π after reordering all 430 digits in a non-descending way. The difference between 430- and 388-digits are due to the 42 zeros existing in these 430 digits that would be at the very beginning and therefore do not appear. No larger prime like this is found in the first 1000 digits of prime. [Rivera]