What is the greatest prime factor of 1+2+3+。。。+60?	Answers:
A) 59	B) 61	C) 31	D) 37	E) 41
find the sum from direct formula = n(n+1)/2 = 60(60+1)/2 = 30*61...   61 is a PRIME number, so ans is 61..   61 is the answer
<result>B</result>
What is the greatest prime factor of 1+2+3+。。。+60?