2 ms·
The future ones (2023, 2031, ...) are primes in lunar arithmetic in base 4 written in base 4, of course. https://oeis.org/A171122 https://oeis.org/A171122
by pvg 4y ago
The future ones (2023, 2031, ...) are primes in lunar arithmetic in base 4 written in base 4, of course.
https://oeis.org/A171122 https://oeis.org/A171122