Alexey Ustinov

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Name Alexey Ustinov
Member for 3 years
Seen May 19 at 2:47
Website
Location Russia
Age 39
specialization: number theory
9

Questions
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Solve in positive integers $n!=m(m+1)$

feb 2 11 at 7:23 Tapio Rajala 1,895●1●6●12

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votes
1
answer
387
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Equal digit sums

apr 20 12 at 15:13 Fedor Petrov 6,789●1●12●38

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3
votes
1
answer
346
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The digit sums again: how far they can be equal?

apr 22 12 at 4:05 Mark Sapir 27.6k●2●57●118

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2
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612
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Solve in positive integers $n!=m^2$

sep 18 10 at 10:22 Robin Chapman 14.5k●2●29●50

 

 

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