When was the last year with this exception? When is the next year with this exception? Fun fact: Last year was a square, this year is a semiprime, and next year is a prime!
@djpro for his text engine Pizza Tower for the music Definitions: Primes: A number with only 1 factor pair. Piprimes: A prime that has some pi digits in order. Perfect numbers: A number that is the sum of its factors EXCEPT itself. Odd perfect numbers haven’t been proved if they exist or not yet. Palindrome numbers: A number that is symmetrical in the middle. 2048 numbers: My nickname for powers of two. Fibonacci numbers: A number that is in the Fibonacci sequence, a sequence where F(n) is F(n-1)+F(n-2), starting with two 1s. Tem numbers: See https://sites.google.com/site/largenumbers/home/appendix/a/ulnl#h.lh6kit4kv4wi. Gross-type numbers: My nickname for powers of twelve. Similar years: Years with the exact same calendar layout. Semiprimes: A number that has only 2 factor pairs. Semisemiprimes: A number that has only 3 factor pairs. Leap years: A year with 366 days instead of 365, which is a multiple of 4. Squares: A number that can be obtained by multiplying a whole number by itself. illions: Starting with 1 million and multiplies by 1,000 each term, formula is 10^(3n+3).
