Jacques Pelletier du Mans
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Jacques Pelletier du Mans (1517–1582) was a French mathematician. While maintaining the original system of Nicolas Chuquet, he proposed names for the intermediate numbers, when grouping by six digits moved towards the modern grouping by three digits. Thus he created, beside the Zillions already existing, the Zilliards. This convention is used throughout the world, except English-language countries, Brazil, Greece, Turkey, Russia and Puerto Rico. Both Chuquet and Pelletier naming conventions are refered to as long scale, contrary to short scale convention used in majority of English-language countries.
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The Chuquet-Pelletier system (long scale)
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| Base 10 | Systematics | Chuquet | Pelletier | Base 16 | Prefix |
|---|---|---|---|---|---|
| 10 0 | Million 0 | <center>unit | <center>unit | 16 0 | <center>[unit] |
| 10 3 | Million 0.5 | <center>thousand | <center>thousand | 16 2.5 | <center>kilo |
| 10 6 | Million 1 | <center>Million | <center>Million | 16 5 | <center> Mega |
| 10 9 | Million 1.5 | <center> thousand million | <center>Milliard | 16 7.5 | <center>Giga |
| 10 12 | Million 2 | <center>Billion | <center>Billion | 16 10 | <center>Tera |
| 10 15 | Million 2.5 | <center>thousand billion | <center>Billiard | 16 12.5 | <center>Peta |
| 10 18 | Million 3 | <center>Trillion | <center>Trillion | 16 15 | <center>Exa |
| 10 21 | Million 3.5 | <center> thousand trillion | <center> Trilliard | 16 17.5 | <center> Zetta |
| 10 24 | Million 4 | <center>Quadrillion | <center>Quadrillion | 16 20 | <center>Yotta |