The book is now available! 223
(just those submitted by Silva)
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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 'Silva': (Click here to show all)

+ The sum of the digits of first primes up to 223 is 449. Note the prime digits and their squares. [Silva]

+ The smallest prime showing a repeated prime digit. [Silva]

+ The smallest prime whose reversal has more than two prime divisors. [Silva]

+ The smallest prime formed from three prime digits. [Silva]

+ 223 = -01+23+45+67+89. [Silva]

(There are 2 curios for this number that have not yet been approved by an editor.)




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