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(just those submitted by Rivera)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

                                                        111111111 1111111111

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

+ The smallest prime Kaprekar number. E.g., 1111111111111111111^2 = 1234567901234567900987654320987654321 and 123456790123456790 + 0987654320987654321 = 1111111111111111111. [Rivera]

+ 11*11*1111111111111111111 = R(2)*R(2)*R(19) = 134444444444444444431, four palindromes. The first three, 11, 11 and 1111111111111111111, are palindromic primes. Note that the concatenation of these three palprimes is R(2).R(2).R(19) = R(23) = 11111111111111111111111. Found by Giovanni Resta. [Rivera]




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