What is the factorial of 256? (256!) 256 Factorial

What is the factorial of 256?

Here we will show you how to calculate the factorial of 256 (aka 256 factorial) and give you the approximate scientific notation answer and the exact answer.

Before we begin, note that the factorial of 256 can be written as 256 followed by an exclamation mark like this: 256!

Factorial of 256 means that you multiply 256 by every number below it. Therefore, you calculate the factorial of 256 by multiplying 256 by 255, then by 254, and so on all the way down to 1. In other words, we calculate 256 × 255 × 254 × ... × 1 to get 256 factorial.

The answer to 256 factorial (256!) contains 507 digits and we have listed the exact entire answer at the bottom of this page. However, below is the approximate scientific notation answer to 256 factorial:

8.5781777534 × 10⁵⁰⁶

The answer above is also sometimes written as 8.5781777534e+506. Regardless, it means that the approximate answer to 256! is 85781777534 followed by 496 more digits.

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Like we promised, below is the exact answer to 256 factorial (256!) with all 507 digits:

857817775342842654119082271681232625157781520279485619859655650377269452553147589377440291360451408450375885342336584306157196834693696475322289288497426025679637332563368786442675207626794560187968867971521143307702077526646451464709187326100832876325702818980773671781454170250523018608495319068138257481070252817559459476987034665712738139286205234756808218860701203611083152093501947437109101726968262861606263662435022840944191408424615936000000000000000000000000000000000000000000000000000000000000000

What is the factorial of 257?
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