Can you name the largest prime factor in each number? by karate02

Can you name the largest prime factor in each number?

created by karate02

Enter an answer in the box below
Correctly named answers will show up below
Click any empty Number or Largest Prime Factor to answer for that location
Note: The prime factors of a quantity are all of the prime quantities that will exactly divide the given quantity
This quiz has not been verified by Sporcle

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Show Missed Answers

Number	Largest Prime Factor
153
97
199
173
193
203
171
191
127
93
107

Number	Largest Prime Factor
133
101
113
177
181
163
117
141
161
149
103

Number	Largest Prime Factor
131
189
183
207
137
157
159
179
119
151
91

Number	Largest Prime Factor
187
139
197
109
167
209
129
147
123
201
143

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Primes Factors Quiz

by karate02

Created Oct 30, 2009 in Science
Game Plays 1,121

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	noon:	Nov 19th, 2009 at 22:36 GMT	1 point
	smallest prime factor instead of prime/notprime would make this less of a typing exercise

	karate02:	Nov 21st, 2009 at 04:57 GMT	-3 points
	Good suggestion - I've made it largest prime factor since it is typically too easy to check if 3 is a factor.

	schadenfreude90:	Nov 21st, 2009 at 06:18 GMT	8 points
	you need to up the time

	karate02:	Nov 21st, 2009 at 21:25 GMT	-2 points
	I should clarify - I never intended this quiz to be able to be fully completed by everyone, it is a test in quick thinking.

	edderson:	Nov 21st, 2009 at 22:16 GMT	1 point
	You mean you made this quiz significantly easier since it was created? You should've just made that another quiz!

	karate02:	Nov 21st, 2009 at 22:42 GMT	-3 points
	@ edderson: I don't know how you thought of that...but no, I did not make the quiz easier.

	mbc:	Dec 7th, 2009 at 08:44 GMT	4 points
	Now it's largest prime factor you need to up the time.

	shaleek:	Dec 24th, 2009 at 04:55 GMT	-1 points
	the first one i got was 153. i typed in 51 and got it wrong. how is it 17?

	wurzelman:	Dec 27th, 2009 at 16:32 GMT	1 point
	^because 51 isn't a prime. This quiz just seems to be guess whether its a prime or not. Surely it would have been better to have non-primes, and then name the largest prime factor in each one.

	Pit_trout:	Feb 23rd, 2010 at 19:38 GMT	1 point
	agree with wurzelman, I think it might be better to use only, or almost only, non-prime numbers. As it is, I find I can get a much higher score by just quickly guessing if each number is prime and hitting "next" if it isn't, until I've got all the primes - and yes, I know I shouldn't do that, but it's really frustrating trying not to, thinking each one through carefully and then finding that much of the time the answer is that it's prime anyway!

	Pit_trout:	Feb 28th, 2010 at 19:18 GMT	1 point
	@karate02: I've made a variant of this quiz, using the new "hide next clue" format; I hope you don't object, but if you do, please let me know and I'll take it down! Thanks for the original, in any case :-)

	MrOss:	Apr 7th, 2010 at 22:30 GMT	1 point
	1 minute is just stupid. C'mon, like the guy in the $700 suit would play this one!