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Prime Number Spiral 7.00 The Prime Number Spiral (a.k.a. the Ulam Spiral) is formed by marking the prime numbers in a spiral arrangement of the natural numbers
| | 59+ Log 1.4 Ham radio logging program. Supports DXCC, IOTA, WAC, WPX and other awards. | | CaterpillarSSA 3.30 The program is based on the model-free method of time series analysis Caterpillar-SSA (Singular Spectrum Analysis). It allows
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