Hello Burlacu !
The 10^9th prime is 22,801,763,489.
The best is, you generate yourself all primes with a
I think it takes not more than any hours, but the file
is very large. Here a trick. This I used years ago for
Every new 10^8 you write the prime in full length in
your file. The other primes you 'encode'. I mean , you
write just the difference to next prime in list. Here
an small example.
Start with 2 then 1, 3, ...,1009,4,8,....
The file is perhaps <1 GB and you can restore all
primes for your project.
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