4,294,967,297

Previous  ... Next

Number

$4 \, 294 \, 967 \, 297$ is:

$641 \times 6 \, 700 \, 417$

The $6$th Fermat number after $3$, $5$, $17$, $257$, $65 \, 537$:

$4 \, 294 \, 967 \, 297 = 2^{\paren {2^5} } + 1 = 2^{32} + 1$

and the $1$st not to be prime.

Also see

• Prime Decomposition of 5th Fermat Number

• Previous  ... Next: Fermat Number

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $257$
• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $4,294,967,297$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $257$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $4,294,967,297$