
Curios:
Curios Search:
Participate: 
GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) Just showing those entries submitted by 'Silva': (Click here to show all)
The smallest prime average of seven consecutive primes: 7, 11, 13, 17, 19, 23, 29. [Silva] Emirp 17 yields three other emirps if 1, 7, and 1+7 zeros are sandwiched between its digits. Obviously, the same can be said of emirp 71. [Silva] The sum of the digits of first primes up to emirp 17 is the next emirp. [Silva] If in each of the twin primes 17 and 19 you sandwich the last digit 9, you will obtain a pair of threedigit twin primes (197, 199). [Silva]
(There are 13 curios for this number that have not yet been approved by an editor.)
Prime Curios! © 20002020 (all rights
reserved)
privacy statement
