Purchasing a User License for
Prime Number Spiral
German version

The price for a single-user license is US$11.95, €9.75 and £7.95, excluding applicable sales tax.

A user license for Prime Number Spiral may be purchased as follows:

  • Via Paymate — simple and easy purchase,
    but payment only via Visa or Mastercard.

  • Via Kagi.

  • Via Share-it. (Questions?)

  • Via PayPal — but this must be done via Kagi or Share-it,
    since we no longer accept PayPal orders directly.

Credit cards orders are made using a secure order form (your credit card data is encrypted during transmission and is not revealed to us). Orders via phone, fax and email are accepted via Kagi and Share-it, both of which support multiple payment methods.

An activation key (to convert the software from a trial or demo version to fully-functional) is supplied only after a user license has been purchased. An activation key can be sent immediately if purchasing via Share-it.  (How?)

The user manual for Prime Number Spiral is available online here.

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