A174277 Primes formed by the initial digits of the decimal expansion of Pi^(1/Pi).

1439, 143961949, 1439619495847590688336490804973755678698296474456640982233160641890243439489175847819775046598413042034429435933431518691836732951984722119433079301

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Mar 14 2010

Keywords

• nonn
• base

Comments

John von Neumann et al. used ENIAC to compute 2037 digits of Pi in 1949, a calculation that took 70 hours. As of Jan 2010, the record is almost 2.7 trillion digits. The symbol for Pi was first put into use by mathematician William Jones in 1706, but only became famous after Swiss mathematician Leonard Euler used it in 1737.

As of March 2019, more than 31 trillion digits of Pi have been calculated. - Harvey P. Dale, Jul 21 2021

Crossrefs

Cf. A000796, A005042.

Programs

Mathematica

Select[a=Pi^(1/Pi);Table[Floor[a*10^n],{n,0,200}],PrimeQ[ # ]&]