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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The smallest compositedigit prime whose prime factors of its digits form another prime when they are concatenated lefttoright. [Honaker] The greatest prime factor of any sevendigit repdigit. [La Haye] 4649 is formed from two consecutive semiprimes (46 and 49); each of them formed from semiprime digits. [Silva] The smallest prime whose each digit as well as number of digits are all composite numbers. [Gudipati]
(There is one curio for this number that has not yet been approved by an editor.)
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