- recurse
((ax + b)%m)
- Lucas Numbers
- palendrom
- Lucas-Lehima Numbers
- Prime solvers
- PrimeGrid / G.I.M.P.S
- Mills numbers (mills numbers)
- Calculating theta (of the Mills primes)
- Factorial
- fermats
- Harmonic Numbers
- ackermann
- busy beaver number
N(n) = (4(n + 1))**2n