Evaluate
1004
Factor
2^{2}\times 251
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2+1+1+0+1000
Add 1 and 1 to get 2.
3+1+0+1000
Add 2 and 1 to get 3.
4+0+1000
Add 3 and 1 to get 4.
4+1000
Add 4 and 0 to get 4.
1004
Add 4 and 1000 to get 1004.
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