List of recent champions for factoring Cunningham numbers:

Quadratic sieve method:
4682	C135	2,1606L	Dodson, A.K. Lenstra, Leyland, Muffett, Wagstaff
4564	C124	2,895-	Jens Franke

Special number field sieve by size of number factored:
4530	C227	2,773+	The Cabal
4677	C219	2,727-	Dodson/AKL/CWI

Special number field sieve by SNFS difficulty:
4530	C227	2,773+	The Cabal
4677	C219	2,727-	Dodson/AKL/CWI

Hybrid Special/General number field sieve by size of number factored:
4083	C123	2,1155+	CWI
4036	C121	2,1650L	CWI

General number field sieve by size of number factored:
4559	C142	2,779-	B. Dodson + CWI + A. K. Lenstra + Edick + P. Leyland
4447	C141	10,212+	A. K. Lenstra + B. Dodson + F. Morain + CWI

Elliptic curve method:
4253	P53	2,677-	C. Curry ECMNET
9011	P50	7,337-	A. Brown ECMNET

Largest penultimate prime factor (ultimate factor shown also):
4677	p98*p128  2,727-    Dodson/AKL/CWI
4342	p93*p118  10,211-   The Cabal

	First five holes in each table on September 18, 2001

2,673-	c151	2,683-	c203	2,713-	c171	2,719-	c208	2,731-	c183
2,647+	c169	2,653+	c154	2,659+	c188	2,661+	c148	2,667+	c161
2,1238L	c160	2,1238M	c145	2,1262L	c177	2,1262M	c178	2,1294L	c187
2,716+	c163	2,736+	c172	2,760+	c153	2,764+	c220	2,772+	c215

3,397-	c178	3,431-	c198	3,437-	c151	3,443-	c187	3,449-	c175
3,397+	c162	3,404+	c141	3,409+	c161	3,412+	c195	3,419+	c173

5,307-	c187	5,311-	c173	5,313-	c210	5,317-	c194	5,319-	c182
5,289+	c156	5,298+	c189	5,302+	c187	5,304+	c172	5,307+	c159

6,257-	c173	6,263-	c196	6,277-	c139	6,281-	c162	6,283-	c173
6,244+	c178	6,251+	c179	6,257+	c200	6,263+	c186	6,268+	c138

7,233-	c155	7,253-	c177	7,257-	c192	7,259-	c175	7,263-	c203
7,232+	c171	7,233+	c150	7,239+	c176	7,253+	c164	7,254+	c178

10,223-	c211	10,227-	c212	10,233-	c162	10,239-	c228	10,241-	c229
10,223+	c201	10,226+	c197	10,229+	c164	10,232+	c205	10,233+	c207

11,199-	c173	11,217-	c171	11,221-	c135	11,227-	c195	11,229-	c217
11,197+	c205	11,206+	c213	11,208+	c185	11,212+	c201	11,218+	c192

12,179-	c190	12,193-	c199	12,197-	c212	12,199-	c146	12,211-	c157
12,178+	c145	12,202+	c216	12,206+	c192	12,208+	c202	12,209+	c185