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

+ Largest prime such that sum of its digits is greater than number of primes up to it. [Gupta]

+ The 29th Fibonacci number (514229) is a prime ending in 29. [Gupta]

+ The smallest multidigit prime which on adding its reverse gives a perfect square (i.e., 29 + 92 = 11^2). [Gupta]

(There is one curio for this number that has not yet been approved by an editor.)




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