Talk:Find largest left truncatable prime in a given base: Difference between revisions
Talk:Find largest left truncatable prime in a given base (view source)
Revision as of 12:27, 10 December 2012
, 11 years ago→Odd base optimization
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==Odd base optimization==
Sadly 24 is not odd, but for bases which are:
:Note that all stems greater than 2 are odd.
:Prepending an odd number to the stem makes a new even candidate stem, which can not be prime.
Therefore it is only necessary to consider cases where the number prepended to the stem is even.
For 2 the situation is the reverese.
--[[User:Nigel Galloway|Nigel Galloway]] 12:27, 10 December 2012 (UTC)
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