|
- 精华
- 0
- 积分
- 67
- 经验
- 67 点
- 威望
- 0 点
- 金钱
- 184 ￥
- 魅力
- 97
|
[讨论]math
T equals the sum of 1 to 30, inclusive, what's the greatest prime factor of T?
If we have enough time, it is easy, but how to quickly get the sum of 1 to 30 due to the limited time is a key factor, or if it ask the sum of 1 to 300, how to do? please tell me the fastest way to get the sum.I think you can't get the greatest prime factor without the sum, because it is a plus, not a multiply from 1 to 30. |
|
