The book is now available! 18181
(just those submitted by Bajpai)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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

+ 18181 is strobogrammatic and well as a tetradic prime. [Bajpai]

+ The only palindromic prime P that is the sum of the squares of the first n oban numbers, i.e., (3^2 + 5^2 + 6^2 +...+ 39^2 + 50^2), (case n=30). Curiously, sod(P) is the smallest invertible prime. [Bajpai]




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