題目網址: www.puzzleup.com/2011/puzzle/?229
加分時限: 10/6 7PM - 10/11 7PM
答對可得基本分１００分。答案可上傳５次，每改１次答案從基本分扣２０分。
比賽期間內可隨時上傳答案，加分時限內答對第ｎ天加（６－ｎ）分
另依題目的難易有額外加分（如有８０％的人這題答錯，答對者加８０分）
◆Prime Sums
A number has the following properties:
The sum of every neighboring three numerals in this number is a prime number.
All of these sums are different than each other.
What is the largest possible value of this number?
一個數有如下的性質：
每個連續三位數字的和都是質數，且這些和也都彼此不相等。
這個數最大是多少？
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最近都在玩質數...XD
還沒仔細做 不過應該和上一題的感覺差不多
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'You've sort of made up for it tonight,' said Harry. 'Getting the
sword. Finishing the Horcrux. Saving my life.'
'That makes me sound a lot cooler then I was,' Ron mumbled.
'Stuff like that always sounds cooler then it really was,' said
Harry. 'I've been trying to tell you that for years.'
-- Harry Potter and the Deathly Hollows, P.308
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