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

                                               5999661 1749274758 4686619009

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

+ This Carmichael number is the smallest of the form (k+1)(2k+1)(4k+1)(7k+1)(14k+1). Here, k = 28 x 2136. Note that 1,2,4,7 and 14 are the proper divisors of the Perfect number 28. [Hartley]

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