93929...42221 (114-digits)

This number is a prime.

9392 9190888786 8584828180 7877767574 7270696866
6564636260 5857565554 5251504948 4645444240 3938363534 3332302827 2625242221

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The largest prime formed by reverse concatenation of n consecutive double-digit composite numbers (n = 57). [Gupta]

Submitted: 2020-07-08 12:38:29; Last Modified: 2020-07-08 13:31:50.