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A174277 Primes formed by the initial digits of the decimal expansion of Pi^(1/Pi). 0
1439, 143961949, 1439619495847590688336490804973755678698296474456640982233160641890243439489175847819775046598413042034429435933431518691836732951984722119433079301 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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 the 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.

LINKS

Table of n, a(n) for n=1..3.

MATHEMATICA

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

CROSSREFS

Cf. A000796, A005042.

Sequence in context: A101798 A081426 A101998 * A063846 A252186 A179691

Adjacent sequences:  A174274 A174275 A174276 * A174278 A174279 A174280

KEYWORD

nonn,base

AUTHOR

Vladimir Joseph Stephan Orlovsky, Mar 14 2010

STATUS

approved

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Last modified September 15 12:44 EDT 2019. Contains 327078 sequences. (Running on oeis4.)