66706...01711 (232-digits)

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

                                                    66 7065556441 6328621661
0559955886 5778567155 6554605356 5253515150 5049504851 4753465645 6044654371
4278418640 9540053916 3828374136 5535703486 3403332132 4031603081 3003292628
5027752701 2628255624 8524152346 2278221121 4520802016 1953189118 3017701711

+ The largest prime formed from reverse concatenation of n consecutive 4-digit triangular numbers (n=58). [Gupta]

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