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(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)

Photo credit: Patrick Kik
+ The first Fibonacci emirp. [Silva]

+ There are 13 composite numbers between 13 and its reversal. [Silva]

+ The longest name of a book of the KJV Bible is Thessalonians with 13 letters. [Silva]

+ The smallest prime formed from consecutive odd digits. [Silva]

+ 13!+31!-1 is prime. [Silva]

+ The smallest prime sum of semiprimes. [Silva]

+ The only Fibonacci prime equal to the sum of the squares of two consecutive Fibonacci primes. [Silva]

+ 13 squared equals the sum of the first five emirps. [Silva]

+ The number of five-digit primes formed from the five nonzero nonprime digits. [Silva]

+ 13 + (1+3) is the next emirp. The only two-digit emirp with that property. [Silva]

(There are 7 curios for this number that have not yet been approved by an editor.)

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