88888...00733 (342-digits)

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

        88 8888888888 8888888881 1111111111 1111888811 1111111111 1118888111
1811111811 1188881188 1111111881 1888881888 1111188818 8888881188 8188811888
8888881111 1111188888 8888888111 1188888888 8888888818 8888888888 8888888888
8888888000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000
0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000733

Unofficial Cambridge Trinity Hall Crest Prime (1073 bits):

 
8888888888888888888
8811111111111111188
8811111111111111188
8811118111118111188
8811881111111881188
8881888111118881888
8888118881888118888
8888811111111188888
8888888111118888888
8888888881888888888
8888888888888888888
0000000000000000000
0000000000000000000
0000000000000000000
0000000000000000000
0000000000000000000
0000000000000000000
0000000000000000733