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Old 2021-06-15, 00:27   #12
MattcAnderson
 
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"Matthew Anderson"
Dec 2010
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A safe amount of time has passed.

Today we know another prime factorization.
Specifically,

ifactor(1,357,928) is 2*2*2*11*13*1187.

This doesn't get old.

Matt
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Old 2021-06-15, 01:52   #13
Uncwilly
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Finding the full factorization of any number below 30 digits is effectively trivial. I just fed a 30 digit semipirime into Dario's ECM site and it found the 2 factors, each 15 digits, in 0.2 seconds.

Why don't you toot your trumpet elsewhere. Like in a rideshare car.

Last fiddled with by Uncwilly on 2021-06-15 at 01:53
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Old 2021-06-21, 05:01   #14
MattcAnderson
 
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"Matthew Anderson"
Dec 2010
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Hi again all,

Today's favorite mega number starts with 1.7 million. I like those numbers.
And to avoid round numbers, I choose the number 1,712,121.
We see that 1,712,121 = 3 * 17 * 59 * 569.
I have a computer with special software, so I can do this factorization.
Also, factordb.com has a Factorize! button, so the capability is also online.
Additionally, Apertron has a nice online integer factorization calculator, so there are options.
Not everyone has factorization software, or knows about those websites.

I like to factor numbers.

Matt
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Old 2021-06-21, 14:09   #15
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In Mathematical Snapshots by Hugo Steinhaus there is a number called "mega." The notation is called "Steinhaus-Moser notation." The notation is, n in a triangle means n^n, n in a square is n in n triangles, and n in a circle means n in n squares. The number mega is 2 in a circle. OK, that's 2 in 2 squares. Now 2 in a square is 2 in 2 triangles. Two in a triangle is 2^2 or 4, and 4 in a triangle is 4^4 or 256. So mega is 256 in a square, or 256 in 256 triangles...

Steinhaus called the number 10 in a circle "megiston."
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Old 2021-07-08, 08:52   #16
MattcAnderson
 
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"Matthew Anderson"
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Hello interested parties,

Today’s mega-number is 1,222,222.
Since I am only typing on my cell phone,
I will not give you the joy of seeing its
Prime factorization. That is all for now.

Matt
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Old 2021-07-08, 14:01   #17
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1222222 = 2 x 611111
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