List of recent champions for factoring Cunningham numbers:

Pollard p-1:
4871	P57	6,396+	P. Zimmermann
4948	P57	11,260+	P. Zimmermann

Special number field sieve by size of number factored:
4949	c248	2,1642M	Aoki+Kida+Shimoyama+Sonoda+Ueda/CRYPTREC
4757	C244	2,809-	Franke/Kleinjung/Bahr/CWI

Special number field sieve by SNFS difficulty:
4949	c248	2,1642M	Aoki+Kida+Shimoyama+Sonoda+Ueda/CRYPTREC
4983	c239	2,811-	NFSNET"

General number field sieve by size of number factored:
4924	C164	2,1826L Aoki+Kida+Shimoyama+Sonoda+Ueda/CRYPTREC
4701	C158	2,953+	F. Bahr + J. Franke + T. Kleinjung

Elliptic curve method:
4830	P57	2,997-	B. Dodson ECMNET
4917	P56	2,827+	K. Aoki ECMNET

Largest penultimate prime factor (ultimate factor shown also):
4835	p105*p107 10,223-   Dodson/AKL/Leyland/CWI
4677	p98*p122  2,727-    Dodson/AKL/CWI

	First five holes in each table on November 8, 2004

2,739-	c168	2,761-	c189	2,781-	c158	2,787-	c204	2,791-	c189
2,667+	c161	2,689+	c170	2,709+	c192	2,719+	c166	2,733+	c175
2,1294L	c187	2,1322M	c175	2,1334L	c186	2,1342L	c170	2,1342M	c138
2,716+	c163	2,736+	c172	2,760+	c153	2,764+	c220	2,772+	c215

3,437-	c151	3,443-	c187	3,449-	c175	3,461-	c157	3,481-	c201
3,424+	c156	3,436+	c194	3,437+	c190	3,452+	c195	3,463+	c200

5,307-	c187	5,311-	c173	5,313-	c210	5,317-	c194	5,319-	c182
5,304+	c172	5,307+	c159	5,311+	c203	5,313+	c197	5,314+	c179

6,263-	c196	6,281-	c162	6,283-	c173	6,293-	c165	6,299-	c155
6,263+	c186	6,269+	c135	6,271+	c195	6,274+	c191	6,283+	c193

7,253-	c177	7,257-	c192	7,259-	c175	7,263-	c161	7,269-	c224
7,239+	c176	7,253+	c164	7,254+	c178	7,257+	c189	7,267+	c185

10,233-	c162	10,239-	c228	10,241-	c229	10,257-	c241	10,263-	c216
10,226+	c197	10,229+	c164	10,232+	c160	10,236+	c193	10,238+	c152

11,217-	c171	11,221-	c135	11,227-	c195	11,229-	c217	11,233+	c181
11,208+	c185	11,212+	c201	11,218+	c192	11,220+	c147	11,224+	c194

12,227-	c197	12,229-	c242	12,233-	c215	12,239-	c255	12,241-	c260
12,218+	c191	12,227+	c213	12,229+	c158	12,232+	c181	12,236+	c151