Nuprl - Proof: prime nat 3 1 2 1

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At: prime nat 3 1 2 1

1. x :

2. 2

x
3.

(

i:{2..x

}. i | x)
4. b :

5. |b| | x
6. |b| ~ b

(|b| ~ 1)

(|b| ~ x)

By:	Rewrite by Thm* a,b:. (a ~ b) a = b

Generated subgoal:

1 |b| = 1 |b| = x
8 steps

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