You can compute five different arithmetic functions online on this page, at precisions of thousands of decimal places. Limited only by the server on which this http page happens to be running at the time. You can also access the functionality of this APM computationally by sending an HTTP header. See details below.

Ever have the hankering to quantify the likelihood that the small chance intelligent life might arise on any given planet arose more than once among millions of trillions of planets? Ever have the need to know the chance of occurrence, at least once, among an astronomical number of attempts at an event of infinitesimal probability? How about the likelihood that prebiotic compounds randomly assembled themselves into the first self replicating molecular system given a billion years and all the atoms on the entire surface of the planet?

I did and I found the answers, but for such questions, something more than a desktop calculator is needed. For that reason, I wrote this software and offer it free for your use. I`m sure there are more complete APMs out there, but I know this one doesn`t cheat because I wrote it. Happy calculating!

Jerry's Home Page

Key West

jerry@jerrywickey.com

800 722 2280

April 13, 2011

Send an HTTP header such as

"http://www.jerrywickey.net/bigmath/bigmath.php?a=1.23e-10&b=456&cal=a&p=100&p1=100&do=Compute&eout=y"

Receive back "<!-- value=4.56000000000123e2" terminated by a carriage return (13), line feed (10). Followed by html code which generates the page you see and which can be ignored.

Where:

?a= <first argument> exponential notation is allowed

&b= <second argument> exponential notation is allowed

&cal= <desired computation>

a for add

s for subtract arg b from arg a

m for multiply

d for divide arg a by arg b

e for raise arg a to the power of arg b (fractional exponents are ignored)

s for subtract arg b from arg a

m for multiply

d for divide arg a by arg b

e for raise arg a to the power of arg b (fractional exponents are ignored)

&p= <desired precision of divide results>

&p1= <desired precision of raise to power results>

&do=Compute&eout=y exactly as shown. Capitalization counts.

I didn't put a lot of time into it, but here it is for anyone to use. The source code probably has some bugs and ugly comments and quick fixes in it, but the basic code itself is sound.

The source code is in C. No installing a library, just cut and past it into your code.

There is also a wrapper for DOS in Windows and for Mac in Terminal. Its a simple wrapper that simply lets you enter the math function and the two operands in plain language yielding a result in plain language.

Be generous setting precision. Over do it. Use a thousand digits when you only need 300. There is no overflow checking. And negative numbers are 9999s so keep it real and positive.

plus minus multiply divide and exponent. Exponent must be an integer, any fractional portion is ignored. The base, however, can be anything.

The DOS version prompts you for each argument.

In the Mac version, set the precision then write the statement in plain language.

1.0000000000000000000000000345^3.4e12

34/.9

1/12.34e6

1-r

You can use r to recall the last result. m to recall what is stored in memory and s to save a result to memory, just follow the prompts.

Set the precision to anything from a few decimal places to thousands.

Just download and double click. If your browser security has fits about them because they are executable, just download the zip and unzip the one you need.

Jerry