login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A174277 Primes formed by the initial digits of the decimal expansion of Pi^(1/Pi). 0

%I #11 Jul 07 2022 19:52:01

%S 1439,143961949,

%T 1439619495847590688336490804973755678698296474456640982233160641890243439489175847819775046598413042034429435933431518691836732951984722119433079301

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

%C 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.

%C As of March 2019, more than 31 trillion digits of Pi have been calculated. - _Harvey P. Dale_, Jul 21 2021

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

%Y Cf. A000796, A005042.

%K nonn,base

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Mar 14 2010

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 30 22:39 EDT 2024. Contains 375550 sequences. (Running on oeis4.)