Processing Math: Done
jsMath

  1. an±1 for a=2,3,5,6,7,10,11,12 and large exponents n [http://homes.cerias.purdue.edu/~ssw/cun/index.html]

  2. an±1 for a≤13 and a not a perfect number [http://wwwmaths.anu.edu.au/~brent/factors.html]

  3. 2n±1 for n≤100 [http://www.euronet.nl/users/bota/medium-p.htm]

  4. 10n±1 for n≤100 [http://www.swox.com/gmp/repunit.html]

  5. pp±1 where p is a prime number and p<180. [http://homes.cerias.purdue.edu/~ssw/bell/r1]

  6. 22n+1 (Fermat numbers) [http://www.prothsearch.net/fermat.html]

  7. 23n±1 [http://www.alpertron.com.ar/MODFERM.HTM]