why this happens?
Here a list of primes congruent to 456 mod 559 and to 1 mod 125:
3251
841751
1959751
2379001
3357251
5313751
5453501
5733001
6711251
6990751
7829251
8248501
if you multiply one of these primes by one of these numbers: 86, 172, 344, 688
you get a multiple of 559 concatenated in base ten with either 86 or 172 or 344or 688
Last fiddled with by enzocreti on 20200611 at 12:51
