4253/Historical Note
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Historical Note on $4253$
The Mersenne number $M_{4253} = 2^{4253} - 1$ was demonstrated to be a Mersenne prime by Alexander Hurwitz on $3$ November $1961$, using an IBM 7090, along with $M_{4423}$, whose primality was similarly demonstrated in the same computer run.
These were the first titanic primes ever discovered.
It is a moot question which one was actually discovered first.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $2^{4253} - 1$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $2^{4253} - 1$