70475422937

This number is a prime.

                                                                7 0475422937

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The decimal value of the fraction (70475422937 * 634061 * 7) / 9999, where the three numbers in the numerator are all primes, is 31283130313031.3130313031...; splitting this into pairs of digits gives 31 28 31 30 31 30 31 31 30 31 30 31, the number of days of each month, in order, in a non-leap year. [Keith]