[math-fun] The 2021 problem
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
25 Dec
25 Dec
5:26 p.m.
JP: "Are there any others?" If you are not excluding leading zeros: 4999493*4999507 = 249950~00249951
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ed pegg -
Hans Havermann