( is 31 prime ? ) ( is 331 prime ? ) ( is 3331 prime ? ) ...
From henhanna@gmail.com@21:1/5 to All on Mon Aug 8 12:48:16 2022
( is 31 prime ? )
( is 331 prime ? )
( is 3331 prime ? )
( is 33 331 prime ? )
( is 333 331 prime ? )
( is 3 333 331 prime ? )
( is 33 333 331 prime ? )
Can _all_ 3333......3331 be Prime Numbers ?
Why does this work (so well) with 3's ?
------- pls (pls, Please... PLEASE ! ) wait a few days before posting answers or hints.
( is 31 prime ? )
( is 331 prime ? )
( is 3331 prime ? )
( is 33 331 prime ? )
( is 333 331 prime ? )
( is 3 333 331 prime ? )
( is 33 333 331 prime ? )
Can _all_ 3333......3331 be Prime Numbers ?
As is noted at https://oeis.org/A051200 (which gives away the answer),
this sequence is mentioned in Martin Gardener's "The Last Recreations".