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Results tagged with digits
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user 3684
4
votes
Accepted
Maximum product of digits of a perfect power
According to https://oeis.org/A052427,
"Pegg (1999) conjectured that the sequence of zeroless cubes (A052045) is finite. On April 19, 1999, Hickerson gave the counterexample: if $n \equiv2 \pmod 3$ an …
- 39.9k
2
votes
Square and reversed integer
At OEIS we have "Skinny numbers: numbers $n$ such that there are no carries when $n$ is squared by long multiplication." It gives as an equivalent formulation, $R(n^2) = R(n)^2$, where $R(n)$ means th …
- 39.9k