Prime Numbers Hats
Description: Prime number 73 in all its retro ink-rolled glory! Not just for the modern math nerd, but for the rest of us who leave the number crunching to our trusty accountants. A great gift for those turning 73 and dig celebrating their arrival at the 21st prime number. And for those born in 1973 who can proudly holler, I’m here, and born in the year of the 298th prime number! Take that, world!!
Description: Twenty-three is the ninth prime number, the smallest odd prime that is not a twin prime. Twenty-three is also the fifth factorial prime,[1] the second Woodall prime.[2] It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1. 23 is the third base-10 repunit prime exponent after 2 and 19.[3] The fifth Sophie Germain prime[4] and the fourth safe prime,[5] 23 is the next to last member of the first Cunningham chain of the first kind to have five terms (2, 5, 11, 23, 47). Since 14! + 1 is a multiple of 23 but 23 is not one more than a multiple 14, 23 is a Pillai prime.[6] 23 is the smallest odd prime to be a highly cototient number, as the solution to x − φ(x) for the integers 95, 119, 143, 529.[7] 23 is the firs...
