86843...77761 (1068-digits)

This number is a prime.

Just showing those entries submitted by 'Luhn': (Click here to show all)

As of September 2001, let p = 109267227191*2500# + 10531091 and we get the largest known prime quadruplet {p, p + 2, p + 6, p + 8}. [Luhn]