perplexus.info :: Numbers : Powers of 2 vs some factorials

Powers of 2 vs some factorials (Posted on 2022-06-08)

Prove that equation
2^x-y! = 2
Has only 2 valid integer solutions.

Bonus: How about x²-y! = 2 ?

Submitted by Ady TZIDON

Rating: 3.5000 (2 votes)

Solution: (Hide)

See Mm׳s comment

Comments: ( You must be logged in to post comments.)

Subject Author Date

D1 solution Math Man 2022-06-08 12:23:37

Solution Larry 2022-06-08 07:36:38

Puzzle Solution: Part B : Method 2 K Sengupta 2022-06-08 07:36:12

Puzzle Solution: Part B K Sengupta 2022-06-08 07:20:39

Puzzle Solution: Part A K Sengupta 2022-06-08 07:07:23

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