47513...82421 (26-digits)

This number is a prime.

                                                475139 8667700924 8633982421

47513986677009248633982421 is a prime P such that it is simultaneously the sum of the squares of two consecutive integers and the difference between the cube of two consecutive integers. P = x^2+(x+1)^2 = (y+1)^3-y^3, for x = 4874114620985, y = 3979697923084. Found by Giovanni Resta. [Rivera]