OFFSET
1,3
COMMENTS
Trying to cut the decimal expansion A001113 of e=2.718281828... into "prime chunks", one gets (2, 7, p, 5, 3, 11, q, 7, 3, 61, 3, 3, 2, r, ...) where p, q, r are 649-, 29-, 53-digit primes, respectively. The size of p makes it impossible to register this more fundamental sequence in the OEIS as it is done in A047777 for Pi. This led us to store just the length of the terms in this sequence.
LINKS
Joseph L. Pe, Trying to Write e as a Concatenation of Primes (2009)
PROG
(PARI) default(realprecision, 2000); c=exp(1)/10; for(k=1, 9e9, ispseudoprime(c\.1^k) & !print1(k, ", ") & k=0*c=frac(c*10^k))
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
M. F. Hasler, Sep 15 2013
EXTENSIONS
a(15)-a(17) from Jinyuan Wang, Mar 26 2020
STATUS
approved