C^3) 
many Figures as you dsfire, of which Method I will give a 
Specimen. 
If the Guriofity of any Gentleman that has leifure would n 
prompt him to undertake to do the Logarithms of all Prime 
Numbers under loopoo to 25* or 30 Figures, I dare alTure 
him that the facility of this Method will invite him thereto, 
nor can any thing more eafie be defired. And to encourage 
him, I here give the Logarithms of the firft Prime Numbers 
under 20 to fixty places, computed by the accurate Pen of 
Mr. Abraham Sharp, (from whofe Induftry and Capacity the 
World may in time expe(3: great Performances) as they were 
communicated to me fay our common Friend Mr, Euclid 
Sfeidall, 
Numb. Logarithm. * 
2 0,301029995663981195213738894724493026768189881462108541310427 
3 0,477121254719662437295027903255115309200128864190695864829866 
7 0,845098040014256830712216258592636193483572396323965406503835 
II 1 ,041 39268515822 5 0407 5 © 1 9997 1 24302424 1 7067021 9046645 30945 96 539 
13 1,113943352306837769206541895026246254561189005053673288598083 
17 1,230448921378273028540169894328337030007567378425046397380368 
19 i,278753^oo95282896i5363334757569293i795ii2933739449759S9o'^Si9 
The next Prime Number is 23,which I will take for an Ex- 
ample of ttie foregoing Do^rine ; and by the firft Rules, the 
Logarithm of the ratio of 22 to 23 will be found to be ei- 
ther 
— ^-4- • -4-—- — . Rtq Qr 
22 968 * 31944 937024 ' 25768160 
ij.-L4.^ — i — &c. 
23 ' IQ58 ^ 36501 ^ 1119364^ 32181715 
As likewife that of the ratio of 23 to 24 by a like Procefs. 
23 1058 ' 36501 1119364 ' 32181715 
1,1,1, I , r 
— JL J- 4- — «— &c 
24 ' 1152 * 41472 ' 1327104 ' 39813120^ • 
Ahd 
