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Talk:Rare numbers: Difference between revisions
→21+ digit rare numbers: added some comments.
m (→21+ digit rare numbers: added a comment about e-mailing Shyam Sunder Gupta concerning a list on his website.) |
(→21+ digit rare numbers: added some comments.) |
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::Regarding missing solutions at 20 digits, I found that the Math.Sqrt() function may drop a few bits of resolution at 20 digits or more. Not totally unexpected. However, the Math.Sqrt() function can be used as an initial accurate first guess in a Newton's method integer square root function.
::::: There is an integer square root function that only uses integers and floating point multiple and division isn't used. -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 07:31, 12 January 2020 (UTC)
::I agree the 8,3 combo should be added for 21+ digits computation. For the task as defined, (5th to 8th number), it's not needed. But for going beyond the table on Shyam Sunder Gupta's webpage, one really needs to consider that combination.
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