Prime Number Theorem and some formulas –python code

Original video here http://www.youtube.com/watch?v=l8ezziaEeNE — PNT

Prime spirals http://www.youtube.com/watch?v=iFuR97YcSLM

Ulam’s spiral http://www.youtube.com/watch?v=3K-12i0jclM

theta ^3^n –rounded down to the nearest whole number is always prime. for certain values of theta
mill’s constant — the smallest such number = 1.30637788386308069…