Khan/khan-exercises — Issue #8736: Prime factorization - Prime factorization of 41
Author: KhanBugz
Created: 2011-12-15 18:22:07+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: burhanclark@gmail.com

I answered 1*41 as the prime factorization and was told it was wrong. While I can see how adding 1*every answer to whats acceptable would be a bit of extra work. Perhaps just adding "dont include *1 or 1* to answers" would be nice to place in the acceptable format bullet a product of prime fators.

[prime_factorization.html?seed=28&problem=prime](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/prime_factorization.html?seed=28&problem=prime&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/prime_factorization.html?seed=28&problem=prime&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%221*41%5C%22%22%2C28%5D%2C%5B%22correct-activity%22%2C%22%5C%2241%5C%22%22%2C66%5D%5D)

["1*41","41"]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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