An e-prime is a prime number appearing in the decimal expansion of e. The first few are 2, 271, 2718281, 2718281828459045235360287471352662497757247093699959574966967627724076630353547594571, ... (OEIS A007512). The numbers of digits in these examples are 1, 3, 7, 85, 1781, 2780, 112280, 155025, ... (OEIS A064118). The following table summarizes the largest known such primes. n | discoverer 2780 | E. W. Weisstein (Jan. 17, 2005) 112280 | E. W. Weisstein (Jul. 3, 2009) 155025 | E. W. Weisstein (Oct. 11, 2010)

constant primes | e | integer sequence primes | phi-prime | pi-prime