The book is now available! 19219...31071 (72-digits)
(just those submitted by Gupta)
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2190188176 1671391331 3012910910 3100979491 8682797068 4944323128 2319131071

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

+ The smallest happy prime formed from concatenation of happy numbers in reverse order. [Gupta]

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