618,970,019,642,690,137,449,562,111/Historical Note

Historical Note on $618 \, 970,019 \, 642 \, 690 \, 137 \, 449 \, 562 \, 111$

$618 \, 970,019 \, 642 \, 690 \, 137 \, 449 \, 562 \, 111 = 2^{89} - 1$ was discovered to be prime in $1911$ by R.E. Powers.

It was the $11$th Mersenne prime to be discovered, although the $10$th in sequence.

François Édouard Anatole Lucas had demonstrated in $1876$ that $2^{127} - 1$ (actually the $12$th in sequence) is prime.

Sources

• Nov. 1911: R.E. Powers: The Tenth Perfect Number (Amer. Math. Monthly Vol. 18, no. 11: pp. 195 – 197)
• 1919: Leonard Eugene Dickson: History of the Theory of Numbers: Volume $\text { I }$ ... (previous) ... (next): Preface