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Special feature (Posted on 2018-07-29) Difficulty: 3 of 5
What is the biggest even number N that can't be written as a sum of odd composite numbers?

Bonus: Find another feature unique to N.

See The Solution Submitted by Ady TZIDON    
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Some Thoughts re(3): computer solution and tidbits from a reference | Comment 5 of 6 |
(In reply to re(2): computer solution and tidbits from a reference by Charlie)

You are correct.

Not usurping 38's place, but a form that alphabetically follows
xxxviii is xxxviij. The swash variant of "j" for "i" used for
the final "i" in instances where lower-case letters are used for the numerals is still found in modern use.

  Posted by Dej Mar on 2018-07-31 10:16:10

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