147,573,952,589,676,412,927

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Number

$147 \, 573 \, 952 \, 589 \, 676 \, 412 \, 927$ is:

$193 \, 707 \, 721 \times 761 \, 838 \, 257 \, 287$

The $67$th Mersenne number:

$147 \, 573 \, 952 \, 589 \, 676 \, 412 \, 927 = 2^{67} - 1$

Mistakenly reported as prime in $1644$ by Marin Mersenne.

Proven composite by Frank Nelson Cole in $1903$.

Also see

• Factors of Mersenne Number M67

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $2^{67} - 1$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $2^{67} - 1$