22222...22299 (19153-digits)

+ The largest minimal 4k+3 prime, i.e., a prime of the form 4k+3 such that deleting any number of its digits never gives another prime of the form 4k+3. [Rupinski]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell