25 Dec
2020
25 Dec
'20
2:06 p.m.
Two consecutive primes can have a product giving a concatenation of consecutive integers. Two simple examples are43×47 = 20~21 891077215721081784886888257701070827×891077215721081784886888257701070829 = 794018604377235322848433897872605582~794018604377235322848433897872605583 Are there any others? --Ed Pegg Jr