Prime Number Spiral
The Prime Number Spiral (a. k. a. the Ulam Spiral) is constructed as follows: Consider a rectangular grid. We start with the central point and arrange the positive integers in a spiral fashion (anticlockwise). The prime numbers are then marked. There is a tendency for the prime numbers to occur... It also (a) allows coloring of the prime numbers in various ways, (b) displays a random arrangement to compare with the primes and (c) shows how square and triangular numbers are located on the spiral.
http://www.hermetic.ch/pns/pns_setup.zip - 2Mb - Download - Screenshot

Factorizer
Factorizer is a Windows program to find factors of numbers up to 2,147,483,646 and to find primes, pairs of primes and Palmen colors of numbers. Or in more detail, Factorizer may be used: (1) to get the prime decomposition of all numbers in a range of numbers, (2) to get all factors of a single... 107 and 109) in a certain range, (5) to count (without displaying) the prime numbers in a range of numbers, (6) to find Fermat and Mersenne primes < 2,147,483,647, and (7) to find the Palmen color of a number or the colors of a range of numbers.
http://www.hermetic.ch/factors/factorizer_setup.zip - 2Mb - Download - Screenshot

CFB Primes
CFB Primes is an optimised PalmOS program which can find the prime factors and closest primes of any integer number up to one billion (US) in a few seconds or less. The standard edit menu allows you to make use of the results in other applications. CFB Primes is available free of charge.
http://www.cfbsoftware.com/palmfiles/primes.zip - 5Kb - Download - Screenshot

Mathematics Suite
3 Mathematics Applications for 1 Price: Factor Calculator, Prime Number Calculator, and Primality Tester All applications feature: Dream ƒrequency "no-frills" style as described by Download. com editor, Recommended on The Math Forum @ Drexel (University) for Middle School, High School and... * Prime Number Calculator - Calculate the prime numbers between any two limits with a single click. ... Notices prime numbers, see screenshot. ... Beeps high if prime and beeps low if has factors. ... Free one month trial.
ftp://s:oftware@dreamfrequency.com/Maths.zip - 6Mb - Download - Screenshot

Prime Number Calculator
Calculate the prime numbers between any two limits with a single click. It uses a deterministic test and uses the Sieve of Eratophenes logic. Displays the result in decimal and binary stars. Small application window allows simultaneous use with Microsoft Word, Outlook, Excel, etc.. ... Free one month trial. ... Only 99¢ per month. ... Educational discount: 20%. ... Recommended on The Math Forum @ Drexel (University) for Middle School, High School and College, ages 6+. ... Sits in tray until needed.
ftp://s:oftware@dreamfrequency.com/Primes.zip - 2Mb - Download - Screenshot

Utilities Suite
10 Utilities for 1 Price: * Phone Mnemonics - Generate words from phone numbers. Find out if your phone number is 1 800 PHONE ME, 555 IAM L337, 555 ROBERTA, etc.. Make your phone number easy, fun and cool to remember, * Epiphany Notes - Create sticky notes on the desktop. ... Notices prime numbers, * Prime Number Calculator - Calculate the prime numbers between any two limits. ... Beeps high if prime and beeps low if has factors, * Google Submitter - Automatically submit your database of URIs and descriptions to Google.
ftp://frequencysoftware.com/Utilities.exe - 4Mb - Download - Screenshot

Hpmbcalc Hex Calculator
This is a programmable multiple-precision hex calculator with many utilities for you to perform a lot of big number math operations. Key Features: 1. Standard hex calculator: basic math operations; Hex/Dec/Oct/Bin conversion; byte/operand swap; square root, Jacobi symbol calculation. ... Pseudo-random data/prime generator: generate pseudo-random sequence of bits; search for random prime. ... 5. ... Hex formatter: ASCII text, c-source code, memory dump, big number to hex number. ... 6. ... Randomicity/primality test: perform primality test and some statistical tests.
http://www.hexprobe.com/hpmbcalc/download/hpmbc332.zip - 1Mb - Download - Screenshot

Lotto007 XP 2006
Lotto007 Lottery software offers you the ability to play the lottery with control. Lotto007 is a powerful mathematical tool which helps you Analyze previous drawings (Number distribute,Base analyze, AC analyze, Number Sum analyze, The zone analyze, Past draws analyze, Hot-cold analyze, Prime... It should not be confused with other lottery software on the market which merely generates random numbers. ... Lotto007 works with all pick 4, 5, 6 or 7 lotteries with 0, 1 or 2 bonus numbers or with 1 powerball number.
http://www.lotto-007.com/download/lotto007/lotto007Setup.exe - 11Mb - Download - Screenshot

Factor Calculator
Calculate the factors of any number with a single click or key press. Notices prime numbers, see screenshot. Beeps to confirm factors calculated. No need to even click a button, simply type the number you want to find the factors of and press enter. No confusing instructions, just two buttons,... Minimizes to tray and pops up when clicked to calculate factors. ... Recommended on The Math Forum @ Drexel (University) for Middle School, High School and College, ages 6+. ... "Nifty," a customer. ... Only 99¢ per month.
ftp://s:oftware@dreamfrequency.com/Factors.zip - 2Mb - Download - Screenshot

AddUp
Powerful multi-purpose calculator densely packed with functionality. FINANCIAL: future value, present value, interest, payment, duration. SCIENTIFIC: logarithms, powers, exponentials, factorials, roots, NIST/CODATA scientific constants. CONVERSIONS: over forty categories of units from the common... PRIME NUMBERS: verify primeness, identify next or previous prime. ... RANDOM NUMBERS: real or complex, linear or Gaussian. ... RATIONAL and FRACTIONAL numbers: input and output using ratios. ... COMPLEX NUMBERS: natively supported plus functions (argument, norm, polar, imaginary, more).
http://orefa.com/addup/2/program/addup2setup.exe - 358Kb - Download - Screenshot